import router from './router'
import store from './store'
import { Message } from 'element-ui'
import Cookies from 'js-cookie'

import NProgress from 'nprogress' // progress bar
import 'nprogress/nprogress.css' // progress bar style
// import { getToken } from '@/utils/auth' // get token from cookie
import getPageTitle from '@/utils/get-page-title'

const _import = require('./router/_import_' + process.env.NODE_ENV+'.js') //获取组件的方法
import Layout from '@/layout'
NProgress.configure({ showSpinner: false }) // NProgress Configuration

const whiteList = ['/login', '/auth-redirect'] // no redirect whitelist

router.beforeEach(async(to, from, next) => {
  // console.log(to)
  // console.log(from)
  // console.log(next)
  // start progress bar
  NProgress.start()

  // set page title
  document.title = getPageTitle(to.meta.title)

  // determine whether the user has logged in
  // const hasToken = Cookies.get('Admin-Token')
  // console.log(store.state.user.token)
  const hasToken=store.state.user.token
  if (hasToken) {
    if (to.path === '/login') {
      // if is logged in, redirect to the home page
      next({ path: '/' })
      // next(`/login`)
      NProgress.done()
    } else {
      // determine whether the user has obtained his permission roles through getInfo
      const hasRoles = store.getters.roles && store.getters.roles.length > 0
      
      if (hasRoles) {
        next()
      } else {
        try {
          // get user info
          // note: roles must be a object array! such as: ['admin'] or ,['developer','editor']
          const { roles } = await store.dispatch('user/getInfo')
          //获取列表
          let menus = store.state.user.list;
          // generate accessible routes map based on roles
          // const accessRoutes = await store.dispatch('permission/generateRoutes', roles)
          menus = filterAsyncRouter(menus) // 1.过滤路由
          router.options.routes = menus;//必须在addroutes前，使用router.options.routes=XXXXX的方法手动添加
          // dynamically add accessible routes
          router.addRoutes(menus)
          // hack method to ensure that addRoutes is complete
          // set the replace: true, so the navigation will not leave a history record
          next({ ...to, replace: true })
        } catch (error) {
          // remove token and go to login page to re-login
          await store.dispatch('user/resetToken')
          Message.error(error || 'Has Error')
          next(`/login?redirect=${to.path}`)
          NProgress.done()
        }
      }
    }
  } else {
    /* has no token*/

    if (whiteList.indexOf(to.path) !== -1) {
      // in the free login whitelist, go directly
      next()
    } else {
      if(to.path=='/large_size'){
        next()
      }
      else if(to.path=='/findpassword'){
        next()
      }else{
        next(`/login?redirect=${to.path}`)
      }
      // other pages that do not have permission to access are redirected to the login page.
      // next(`/login?redirect=${to.path}`)
      NProgress.done()
    }
  }
})

router.afterEach(() => {
  // finish progress bar
  NProgress.done()
})
function filterAsyncRouter(asyncRouterMap) { //遍历后台传来的路由字符串，转换为组件对象
  const accessedRouters = asyncRouterMap.filter(route => {
    if (route.component) {
      if (route.component === 'Layout') { //Layout组件特殊处理
        route.component = Layout
      } else {
        route.component = _import(route.component)
      }
    }
    if (route.children && route.children.length) {
      route.children = filterAsyncRouter(route.children)
    }
    return true
  })
  return accessedRouters
}